Stool



FIG. 1 is a perspective view of the stool;

FIG. 2 is a front view of the stool;

FIG. 3 is a rear view of the stool;

FIG. 4 is a left view of the stool;

FIG. 5 is a right view of the stool;

FIG. 6 is a top view of the stool; and,

FIG. 7 is a bottom view of the stool.

The broken lines in the drawings depict portions of the stool that form no part of the claimed design. 

CLAIM The ornamental design for a stool, as shown and described. 